油气管道全位置单枪双丝自动焊接技术

依据双丝焊技术原理,研制管道全位置单枪双丝自动焊系统,并针对X80钢级管线钢进行焊接试验,制定"内焊机根焊+单枪双丝全位置自动焊填充、盖面焊"的高效焊接工艺.结果表明,管道全位置单枪双丝焊接可有效解决现有管道焊接施工中出现的焊缝层间未熔合、气孔、未焊透、焊道不连续、咬边等缺陷,保证焊接质量.同时,可将管道焊缝的单层填充厚度由传统自动焊接工艺下的2~3 mm提升至4~6 mm,且焊缝成形美观、力学性能优良,满足了管道建设工程高效化施工对焊接高效率的要求,对油气长输管道的现场焊接施工具有应用价值与指导意义.

Tandem automatic welding technology for oil and gas pipelines

This article develops tandem automatic welding system for pipeline according to the principle of tandem welding technology, develops efficient welding technology about "Internal welding machine for root welding and double wire automatic welding for filling and capping welding". Experiments indicate tandem automatic welding technology can avoid defects existing in pipeline welding construction effectively to ensure the welding quality, such as incomplete fusion, stomata, incomplete penetration, pipeline welding discontinuous and undercut. At the same time, it can increase the weld single-layer filling thickness from2-3 mm to 4-6mm, and it can get beautiful welding gap, excellent mechanical properties. This technology can meet pipeline construction on the welding requirements of high efficiency, and has the application value and guiding significance for construction of oil and gas field welding of pipeline.